Actually, you may not need a fungicide at all.
Mold, fungi, and bacterial rot will not grow on living tissue. It is obvious from your description that you suffocated the root system, and that there are some obviously dead roots, but some (the moldy ones) that may- or may not be total goners.
Remove the rotting ones, and do the same for moldy ones in really bad shape, but leave the others. The fungicidal dip is optional - I agree with Camille on the cinnamon; use Physan or liquid chlorine bleach (1 oz/gal) - then repot the plant into an airy medium.
As it is already desiccated (wrinkly leaves), you'd do well to keep it very warm and very humid until it recovers.
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